KR20000040160A - Method for obtaining data on reason of stopped operation of main controller in switching center - Google Patents

Abstract

PURPOSE: A method for obtaining data on a reason of a stopped operation of a main controller in a switching center is provided to supply the data which enables a tracking of the reason why the controller has entered an abnormal state, by storing the values of registers and stacks in the controller in a secondary memory, when the controller returns to a normal state again after the abnormal state. CONSTITUTION: If an abnormal state occurs while a main controller executes a program(ST1), it is stopped and then operated again(ST2). The controller stores the values of registers and stacks temporarily in itself(ST3), and stores them in a secondary memory(ST4). A main memory is initialized(ST5). If the data in the secondary memory is requested to be searched by a secondary memory searching tool(ST7), the main controller outputs the data in the secondary memory to a print or monitor(ST8). A system operator can analyze the output data, and thereby check that the main controller executes what part of the program before it enters the abnormal state in order to track the reason why the main controller enters the abnormal state.

Description

How to obtain information on the reason for the operation stop of the main controller

The present invention relates to an exchange, and in particular, when the main control unit provided in the exchange suddenly enters into an abnormal state and stops operation and returns to a normal state through a restart process, the value and stack of registers such as a program counter of the main control unit in the auxiliary storage unit is returned. (Stack) relates to a method for obtaining operation stop cause information of an exchange main controller to store data to easily track the cause of the main controller entering an abnormal state.

In general, a system such as an exchanger is provided with a main controller for controlling various circuit parts. Since the main controller can operate normally only when the main controller is operated normally, an abnormal state occurs in the main controller and the main controller is stopped. In this case, it is necessary to trace the cause of entering the abnormal state and to solve the cause.

Conventionally, when an abnormal state occurs in the main control unit of the exchange during operation of the exchange, and the operation stops and returns to a normal state through a restart process, all the internal data processed by the main control unit is initialized, thereby tracking the abnormal state of the main control unit. Since no data is available, there is a problem of mobilizing equipment such as an expensive logic analyzer to obtain such data.

The present invention has been made to solve the problems described above, the object is that the main control unit provided in the exchanger suddenly enters into the abnormal state when the operation stops and stops to return to the normal state through the restart process, the main control unit The present invention provides a method of obtaining operation stop cause information of an exchange main control unit that stores data of registers such as a program counter of a device and a stack value so that the main controller can be easily traced to a cause of entering an abnormal state. .

1 is a block diagram of an exchanger according to the present invention;

2 is a flowchart illustrating a process of securing operation stop cause information of an exchange main controller according to the present invention;

Explanation of symbols on the main parts of the drawings

11: subscriber matching unit 12: main controller

13: main memory 14: auxiliary memory device

15: signal device matching unit 16: relay line matching unit

17: relay signal matching unit

A feature of the present invention for achieving the above object comprises the steps of: storing the register value and the stack value of the main controller in itself when the main controller of the exchanger is stopped and restarted to return to a normal state; Storing the stored register value and stack value in an auxiliary memory device; And when the inquiry request for the auxiliary memory device is generated, reading and outputting a register value and a stack value of the auxiliary memory device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, the switch according to the present invention includes a subscriber matching unit 11, a main control unit 12, a main memory 13, an auxiliary memory device 14, a signal device matching unit 15, and a relay line matching unit. (16), a relay signal matching section 17 is provided. The subscriber matching unit 11 matches the subscriber telephone TP, and the signaling device matching unit 15 matches the signaling apparatus for processing the signal for the subscriber telephone TP. The main controller 12 controls each circuit unit connected to itself to control an operation for the exchange process, and the main memory 13 performs a function of storing data generated when the main controller 12 performs an operation. The auxiliary memory device 14 performs a function of storing data under the control of the main controller 12. The relay line matching unit 16 matches the relay lines connected to the general switching network, and the relay signal matching unit 17 matches the signal devices for processing signals for the relay lines.

In the present invention, when an abnormal state occurs in the main control device 12 of the exchange and the main control device 12 stops operation, the main control device 12 can easily track the cause of entering the abnormal state, When the main controller 12 suddenly enters into an abnormal state, stops operation, and restarts to a normal state, the auxiliary memory device 14 stores the program counter of the main controller 12 and a plurality of register values and stack values. Save it. That is, the main controller 12 is provided with a plurality of registers such as a program counter for storing binary information of a predetermined length capable of performing arithmetic and logical operations, information analysis, transmission, and the like. A stack pointer is provided for adjusting the stack address, and if the register value and the stack value of the stack pointer that the main controller 12 has stopped operating are analyzed, it is determined that an abnormal state has occurred while executing the program. As can be traced, the register value and the stack value of the main control unit 12 are stored in the auxiliary memory device 14 when the main control unit 12 suddenly enters an abnormal state, stops operation, and returns to a normal state through a restart process. By storing the data, the main controller 12 easily enters into an abnormal state by using the data of the auxiliary memory device 14 later. It makes it possible to trace.

As described above, a process of securing data capable of tracking the cause of the operation stop of the main controller 12 will be described with reference to the flowchart of FIG. 2.

First, when an abnormal state occurs while the main controller 12 executes a program and operates (step ST1), the main controller 12 stops operation and is restarted (step ST2). At this time, the main controller 12 stores the register value recorded in its registers and the stack value recorded in the stack pointer in itself (step ST3), and then in the auxiliary memory device 14 (step ST4). ), The main memory 13 is initialized (step ST5), and the main controller 12 starts normal operation (step ST6). Subsequently, if data inquiry of the auxiliary memory device 14 is requested through the auxiliary memory inquiry tool (a program having a function of inquiring the information of the auxiliary memory) (step ST7), the main controller 12 is connected to the auxiliary memory device 14; The data stored in the file is output through a monitor or a printer (step ST 8). Accordingly, the system operator analyzes the output data to determine which part of the program the main controller 12 enters into an abnormal state to track the cause of the abnormal state entry.

As described above, in the present invention, when the main controller 12 suddenly enters into an abnormal state, stops operation, returns to a normal state through a restart process, the register value and stack of the main controller 12 are stored in the auxiliary memory device 14. By storing the value, the data of the secondary memory device 14 can later be used to easily track the cause of the main controller 12 entering an abnormal state.

As described above, in the present invention, when the main controller provided in the exchanger suddenly enters into an abnormal state and stops operation, and then returns to a normal state through a restart process, the values of the registers and the stack value of the main controller are stored in the auxiliary memory. Because it stores, it is possible to easily trace the cause of entering the abnormal state of the main controller even without using an expensive logic analyzer.

Claims (1)

Storing a register value and a stack value of the main control unit in a state where the main control unit of the exchange is stopped and restarted to return to a normal state; Storing the stored register value and stack value in an auxiliary memory device; And reading out the register value and the stack value of the auxiliary memory device when the inquiry request for the auxiliary memory device is generated.